Re: 96 kHz -- a bottleneck somewhere

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On 27/04/14 03:23, Jonathan E Brickman wrote:
I decided to try 96 kHz audio with the S.R.O. (Supermega Rumblic Organ), my slightly Aslan-like synth (it is not a tame device really), and found items which may be of interest:

1.  At 96 kHz, schedtool definitely matters.  Taking it out increased xruns a
lot.  I tried to figure out what was interfering via htop, but it was very
unclear.  So I'm keeping the schedtool for now.  I could believe that if I
reengineer for a zero-X default setup (likely to happen in the future) this
problem might go away, X and the desktop certainly do have lots of demands.
I *think* the only big piece missing for me in this is keymapping, I use
F-keys to switch patches, quite easy in both LXDE and MATE.

thd .... otherwise known as trigger-happy-daemon  ... does keymapping without X,
debian package is:
triggerhappy

Description-en: global hotkey daemon for Linux
 Triggerhappy watches connected input devices for certain key presses
 or other input events and runs administrator-configured
 commands when they occur. Unlike other hotkey daemons, it runs as a
 persistent, systemwide service and therefore can be used even
 outside the context of a user or X11 session.
 .
 It can handle a wide variety of devices (keyboards, joysticks,
 wiimote, etc.), as long as they are presented by the kernel as
 generic input devices. No kernel patch is required. The daemon is
 a userspace program that polls the /dev/input/event? interfaces
 for incoming key, button and switch events. A single daemon can
 monitor multiple input devices and can dynamically add additional
 ones. Hotkey handlers can be assigned to dedicated (tagged) devices
 or globally.
 .
 For example, this package might be useful on a headless system to
 use input events generated by a remote control to control an
 mpd server, but can also be used to allow the adjustment of audio
 and network status on a notebook without relying on user specific
 configuration.
 .
 Key combinations are supported as well as the hotplugging of devices
 using a udev hotplug script; the running daemon can also be influenced
 by a client program, e.g. to temporarily pause the processing of
 events or switch to a different set of hotkey bindings.
Homepage: http://github.com/wertarbyte/triggerhappy


Simon

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